Set the monitor power state to DP_SET_POWER_D3 to avoid garbage. Signed-off-by: Jitao Shi <jitao.shi@xxxxxxxxxxxx> Signed-off-by: Bo-Chen Chen <rex-bc.chen@xxxxxxxxxxxx> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx> --- drivers/gpu/drm/mediatek/mtk_dp.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index 80dd2b999463..637fd535704a 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1799,6 +1799,11 @@ static void mtk_dp_bridge_atomic_disable(struct drm_bridge *bridge, { struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge); + if (mtk_dp_plug_state(mtk_dp)) { + drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3); + usleep_range(2000, 3000); + } + mtk_dp_video_mute(mtk_dp, true); mtk_dp->enabled = false; -- 2.18.0